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BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...BLUETOOTH SPECIFICATION Version 4.0 [Vol 6] Part B 2.4）
LLID（逻辑链路ID）：0x01表示该数据包是一个帧的延续内容，或者这是一个空的“逻辑链路控制及适配协议”数据包；0x02表示一个“逻辑链路控制及适配协议”数据包的开始...
What are some methods to debug Javascript inside of a UIWebView?
...performSelector:@selector(_enableRemoteInspector)]; Remember to remove the call when you build for release!
– rpitting
Apr 3 '12 at 13:58
...
Computed read-only property vs function in Swift
... when only a simple value is returned. That way I can easily see whether a call is cheap (properties) or possibly expensive (functions).
We will probably get more clarity when Apple publishes some Swift coding conventions.
...
How to check if object has any properties in JavaScript?
...ct(obj) {
for(var prop in obj) {
if (Object.prototype.hasOwnProperty.call(obj, prop)) {
return false;
}
}
return true;
}
isEmptyObject({}); // true
isEmptyObject({foo:'bar'}); // false
The hasOwnProperty method call directly on the Object.prototype is only to add little more ...
Why can't I define a static method in a Java interface?
...oking a static method requires a class, and since that class is known statically—at compile time—dynamic dispatch is unnecessary.
A little background on how instance methods work is necessary to understand what's going on here. I'm sure the actual implementation is quite different, but let me e...
Difference between SurfaceView and View?
...mal view update mechanism is constraint or controlled by the framework:You call view.invalidate in the UI thread or view.postInvalid in other thread to indicate to the framework that the view should be updated. However, the view won't be updated immediately but wait until next VSYNC event arrived. T...
Database Structure for Tree Data Structure
...ik Ben-Gann has a good overview of the most common options in his book "Inside Microsoft SQL Server 2005: T-SQL Querying".
The main things to consider when choosing a model are:
1) Frequency of structure change - how frequently does the actual structure of the tree change. Some models provide bett...
General guidelines to avoid memory leaks in C++ [closed]
...+ programs? How do I figure out who should free memory that has been dynamically allocated?
29 Answers
...
How to write a:hover in inline CSS?
...swer: you can't.
Long answer: you shouldn't.
Give it a class name or an id and use stylesheets to apply the style.
:hover is a pseudo-selector and, for CSS, only has meaning within the style sheet. There isn't any inline-style equivalent (as it isn't defining the selection criteria).
Response ...
How to trigger jQuery change event in code
... something like:
$(document).ready(function() {
$("#yourInitialElementID").change(function() {
// Do something here...
$(".yourDropDownClass").change();
});
});
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